Sag Template of Transmission Lines by khi66344

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									                           SRI VIVEKA INSTITUTE OF TECHNOLOGY
                                    MADALAVARIGUDAM, KRISHNA Dt.
                             Department of Electronics and communication Engineering
                                          FIRST SEMESTER 2010-11
                                                 Course Handout
                                                                                                   Date: 14.06.2010
 Course Title                  POWER SYSTEMS-II

1. Course description: This course is an advancement of power systems-I .The course covers topics including the
designing of transmission lines, their parameters, performance, factors governing them, types of insulators need to be
installed, sag calculations and underground cables

2. Scope and Objective of the course: In present world power plays vital role in the development of any country.
Transmission and Distribution of power efficiently makes industrial growth faster. The objective of this course deals
with basic theory of transmission lines modeling and their performance analysis. Also this course gives emphasis on
mechanical design of transmission lines, cables and insulators.

    T1. A Text Book on Power System Engineering by M.L.Soni, P.V.Gupta, U.S.Bhatnagar,
        A.Chakrabarthy, Dhanpat Rai & Co Pvt. Ltd.
    T2.Electrical power systems - by C.L.Wadhwa, New Age International (P) Limited, Publishers.

    R1.Power system Analysis-by John J Grainger William D Stevenson, TMC Companies, 4th edition
    R2.Power System Analysis and Design by B.R.Gupta, Wheeler Publishing.
    R3.Power System Analysis by Hadi Saadat – TMH Edition..
    R4. Modern Power System Analysis by I.J.Nagaraj and D.P.Kothari, Tata McGraw Hill, 2nd Edition.

5. Course Plan:
Lec. No.       Learning Objectives                     Topics to be covered                        References
  1-2      Fundamentals of power           Single phase,3phase transmission,                 Ch 1 of T2

  3-10     Line constant calculations      Types of conductors - calculation of              Ch. 2of T1&
                                           resistance for solid conductors - Calculation     Ch 4, 5 of R1
                                           of inductance 1&3 phase, single and double
                                           circuit lines, concept of GMR & GMD,
                                           symmetrical and asymmetrical conductor
                                           configuration with and without transposition,
                                           Numerical Problems. Calculation of
                                           capacitance for 2 wire and 3 wire systems,
                                           effect of ground on capacitance, capacitance
                                           calculations for symmetrical and
                                           asymmetrical single and three phase, single
                                           and double circuit lines, Numerical Problems.
 11-23     Current and voltage              Short, medium and long line and their model      Ch.4 of T2
           relations of transmission       representations - Nominal-T, Nominal-Pie and      Ch 6 of R1
           lines                           A, B, C, D Constants for symmetrical &
                                           Asymmetrical         Networks,       Numerical
                                           Mathematical Solutions to estimate regulation
                                           and efficiency of all types of lines          -
                                           Numerical Problems.
                                       Long Transmission Line-Rigorous Solution,
                                       evaluation     of    A,B,C,D     Constants,
                                       Interpretation of the Long Line Equations,
                                       Incident, Reflected and Refracted Waves -
                                       Surge Impedance and SIL of Long Lines,
                                       Wave Length and Velocity of Propagation of
                                       Waves - Representation of Long Lines -
                                       Equivalent-T and Equivalent Pie network
                                       models (numerical problems).

24-29   Power System Transients         Types of System Transients - Travelling or Ch. 12 of T2
                                       Propagation of Surges - Attenuation,
                                       Distortion, Reflection and          Refraction
                                       Coefficients - Termination of lines with
                                       different types of conditions - Open Circuited
                                       Line, Short Circuited Line, T-Junction,
                                       Lumped Reactive Junctions (Numerical
                                       Problems). Bewley’s Lattice Diagrams (for all
                                       the cases mentioned with numerical

30-36   Factors            governing                                                  Ch 6 of T2
        transmission lines           Skin and Proximity effects - Description and
                                     effect on Resistance of Solid Conductors -
                                      Ferranti effect - Charging Current - Effect on
                                      Regulation of the Transmission Line, Shunt
                                      Corona - Description of the phenomenon,
                                      factors affecting corona, critical voltages and
                                      power loss, Radio Interference.

37-41   Overhead Line Insulators       Types of Insulators, String efficiency and Ch-8 of T2
                                       Methods for improvement, Numerical
                                       Problems - voltage distribution, calculation of
                                       string efficiency, Capacitance grading and
                                       Static Shielding.

42-48   Sag       and       Tension Sag and Tension Calculations with equal and Ch. 7of T2
        Calculations                unequal heights of towers, Effect of Wind and
                                    Ice on weight of Conductor, Numerical
                                    Problems - Stringing chart and sag template
                                    and its applications.

49-55   Underground cables:            Types of Cables, Construction, Types of           Ch. 9 of T2
        Insulated cables               Insulating materials, Calculations of
                                       Insulation resistance and stress in insulation,
                                       Numerical Problems. Capacitance of Single
                                       and 3-Core belted cables, Numerical
                                       Problems.Grading of Cables - Capacitance
                                       grading, Numerical Problems, Description of
                                       Intersheath grading
6. Assignments: Comprises of Reading and/or Home assignments. Details will be announced in the class from time to
time and also will be uploaded in college website.

7.Evaluation scheme
EC        Evaluation            Duration      Marks       Date    Time        Venue
No        Component             minutes
MID-I     Descriptive-1            90         10          Will be Announced later
          Internal Quiz-1          30         2
          Open Book Tests          30         2 (each)    Continuous          ---
          (at the end of each                 =
          unit)                               4x2=8M
          Online Quiz-1              20       20          Will be Announced later

MID-II    Descriptive-2              90       10          Will be Announced later
          Internal Quiz-2            30       2
          Open Book Tests            30       2 (each)    Continuous
          (at the end of each                 =
          unit)                               4x2=8M
          Online Quiz -2             20       20          Will be Announced later
08. Notices: Concerning the course will be displayed on Department Notice Board.


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